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Green Knoll, New Jersey

Community in Somerset County, New Jersey

Air quality

The air at Green Knoll

Index 28, good, led by fine particles. Read at 4 AM from its reporting area, North Central (NJ), 12 miles off.

28Good
  • Fine particles (PM2.5)28Good11.4 mi
  • Ozone21Good12 ppb11.4 mi
  • Nitrogen dioxide1Good1 ppb13.3 mi
  • Sulfur dioxide0Good0 ppb13.3 mi
  • Carbon monoxide-0.1 ppm21.8 mi

The days ahead

Good each day through Today, led by ozone. Yesterday measured 28, good.

Smoke, the next 40 hours

Little smoke near the ground through Sat 8 PM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Green Knoll

None in the last 3 days, to Fri 4 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at Green Knoll, the next 40 hours

Mist or haze: visibility falls to 2 miles Fri 10 AM.

FriSat

On the radar over Green Knoll, New JerseyReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 5 instruments nearest Green Knoll, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.0 miles away.

measured now3 instruments

SomervilleSMQ

At an airfield/3.3 mi away/105 ft/21 ft below here

temp, wind, gust, visibility, precip, pressure

Rank418of 737

measured daily2 instruments

Bridgewater Twp 1.5 NNWNJ-SM-111

In a volunteer observer's own ground/1.0 mi away/180 ft/54 ft above here

precip, snowfall, snow depth

Rank-

Bound Brook 2WBBKN4

At a cooperative observer's station/4.3 mi away/48 ft/78 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Somerville, drawn

The nearest airport reporting now, 3.3 mi from Green Knoll, New Jersey. From its report of Oct 16, 2026, 3:53 AM local time: 3 of its 6 sheets.

The sky

Overcast at 2,300 ft; the ceiling is 2,300 ft; visibility 6 mi.

Section of the sky over Somerville, height above the station to scale: overcast cloud with its base at 2,300 feet, the ceiling at 2,300 feet, and visibility of 6 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SMQFIG. A THE SKY OVER SOMERVILLESECTION, HEIGHT ABOVE THE STATION TO SCALE, EACH LAYER AT THE HEIGHT OF ITS BASE AS REPORTED; COVER IN EIGHTHS OF THE SKY; TOPS NOT MEASUREDFT ABOVE THE STATION05001,0001,5002,0002,5003,0003,500ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,300 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 2,300 FTVISIBILITY, MILES: 6 MI0510TITLESomerville, the skySTATION REPORT · ASOS SMQTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SMQ-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

56.0 F with a dew point of 54.0 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 500 ft up; the lowest cloud reported is at 2,300 ft.

Chart of the air at Somerville: temperature 56.0 degrees Fahrenheit and dew point 54.0, 93 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 500 feet above the station, against the lowest cloud reported at 2,300 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SMQFIG. B THE AIR AT SOMERVILLETHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 F70 FSATURATES 500 FT ABOVE THE STATION, AT 53.5 FLOWEST CLOUD REPORTED, OVC 2,300 FTTEMPERATURE AND DEW POINT 56.0 F, 54.0 FRELATIVE HUMIDITY 93 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLESomerville, the airSTATION REPORT · ASOS SMQTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SMQ-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Somerville, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SMQFIG. C THE WIND AT SOMERVILLEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESomerville, the windSTATION REPORT · ASOS SMQTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SMQ-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Somerville, in 6 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in New Jersey

22 places, each with its own forecast and its own instruments.

Near Green Knoll

The nearest places, each with its own forecast and the instruments nearest it.

Near Green Knoll

River and lake gauges